Chauncey Billups delivered 28 points, including two clutch free throws, as the Pistons dealt the Celtics their first home defeat of the NBA season on Wednesday.

Billups' two free throws with one-tenth of a second left to play proved the difference in the Pistons' 87-85 victory over the Celtics.

Richard Hamilton chipped in 21 points for the Pistons, who improved to 18-7 overall and an NBA leading 9-2 on the road.

Boston, meanwhile, saw their 12-game home-court winning streak end. The Celtics had won their last nine games.